World's Best Scientists 2026 revealed!
Robert H. Pietrzak

Robert H. Pietrzak

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Psychology 97 716 625 449 381 480 32152
Medicine 97 9360 8783 4826 4462 477 31465

Robert H. Pietrzak publications per year

The chart shows the history of publications by Robert H. Pietrzak between 2002 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Robert H. Pietrzak published across 25 years, from 2002 to 2026, averaging 31.6 papers a year. Output peaked at 91 publications in 2021. 70 of the 789 publications appeared in the last two years.

No. of publications
20 40 60 80
Bar chart. Horizontal axis: year, 2002 to 2026. Vertical axis: number of publications, 0 to 91. Peak 91 publications in 2021. 2002: 1 publication 2003: 2 publications 2004: 1 publication 2005: 3 publications 2006: 7 publications 2007: 6 publications 2008: 8 publications 2009: 12 publications 2010: 9 publications 2011: 24 publications 2012: 20 publications 2013: 25 publications 2014: 39 publications 2015: 38 publications 2016: 40 publications 2017: 42 publications 2018: 31 publications 2019: 39 publications 2020: 43 publications 2021: 91 publications 2022: 81 publications 2023: 89 publications 2024: 68 publications 2025: 69 publications 2026: 1 publication
2002 2026

789 publications in total across all disciplines

View publications per year as a table
Robert H. Pietrzak: publications per year, 2002 to 2026
Year Publications
2002 1
2003 2
2004 1
2005 3
2006 7
2007 6
2008 8
2009 12
2010 9
2011 24
2012 20
2013 25
2014 39
2015 38
2016 40
2017 42
2018 31
2019 39
2020 43
2021 91
2022 81
2023 89
2024 68
2025 69
2026 1
Total 789
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Robert H. Pietrzak publication distribution in Psychology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Psychology in 2026. The highlighted bar marks where Robert H. Pietrzak sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 69 bars. Horizontal axis: publications, 31–40 to 705+. Vertical axis: number of scientists, 0 to 736. Most scientists, 736, have 101–110 publications. The last bar groups every scientist with 705 publications or more. The highlighted bar, 471–480 publications, is where this scientist sits. 31–40 publications: 6 scientists 41–50 publications: 52 scientists 51–60 publications: 138 scientists 61–70 publications: 299 scientists 71–80 publications: 461 scientists 81–90 publications: 605 scientists 91–100 publications: 713 scientists 101–110 publications: 736 scientists 111–120 publications: 686 scientists 121–130 publications: 670 scientists 131–140 publications: 644 scientists 141–150 publications: 597 scientists 151–160 publications: 576 scientists 161–170 publications: 477 scientists 171–180 publications: 450 scientists 181–190 publications: 397 scientists 191–200 publications: 343 scientists 201–210 publications: 328 scientists 211–220 publications: 313 scientists 221–230 publications: 283 scientists 231–240 publications: 226 scientists 241–250 publications: 196 scientists 251–260 publications: 201 scientists 261–270 publications: 171 scientists 271–280 publications: 151 scientists 281–290 publications: 139 scientists 291–300 publications: 113 scientists 301–310 publications: 102 scientists 311–320 publications: 100 scientists 321–330 publications: 76 scientists 331–340 publications: 92 scientists 341–350 publications: 85 scientists 351–360 publications: 69 scientists 361–370 publications: 71 scientists 371–380 publications: 63 scientists 381–390 publications: 58 scientists 391–400 publications: 57 scientists 401–410 publications: 43 scientists 411–420 publications: 33 scientists 421–430 publications: 50 scientists 431–440 publications: 41 scientists 441–450 publications: 32 scientists 451–460 publications: 27 scientists 461–470 publications: 28 scientists 471–480 publications: 25 scientists 481–490 publications: 28 scientists 491–500 publications: 20 scientists 501–510 publications: 23 scientists 511–520 publications: 26 scientists 521–530 publications: 17 scientists 531–540 publications: 21 scientists 541–550 publications: 14 scientists 551–560 publications: 16 scientists 561–570 publications: 10 scientists 571–580 publications: 22 scientists 581–590 publications: 9 scientists 591–600 publications: 14 scientists 601–610 publications: 9 scientists 611–620 publications: 11 scientists 621–630 publications: 4 scientists 631–640 publications: 7 scientists 641–650 publications: 5 scientists 651–660 publications: 10 scientists 661–670 publications: 8 scientists 671–680 publications: 8 scientists 681–690 publications: 4 scientists 691–700 publications: 3 scientists 701–704 publications: 4 scientists 705+ publications: 100 scientists
31–40 publications 705+

This scientist: 480 publications — 97th percentile

97% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 705 publications or more.

View publications distribution as a table
Number of Psychology scientists by publication count, Research.com 2026 ranking edition. Based on 11,416 ranked scientists.
Publications Scientists This scientist
31–40 6
41–50 52
51–60 138
61–70 299
71–80 461
81–90 605
91–100 713
101–110 736
111–120 686
121–130 670
131–140 644
141–150 597
151–160 576
161–170 477
171–180 450
181–190 397
191–200 343
201–210 328
211–220 313
221–230 283
231–240 226
241–250 196
251–260 201
261–270 171
271–280 151
281–290 139
291–300 113
301–310 102
311–320 100
321–330 76
331–340 92
341–350 85
351–360 69
361–370 71
371–380 63
381–390 58
391–400 57
401–410 43
411–420 33
421–430 50
431–440 41
441–450 32
451–460 27
461–470 28
471–480 25 480
481–490 28
491–500 20
501–510 23
511–520 26
521–530 17
531–540 21
541–550 14
551–560 16
561–570 10
571–580 22
581–590 9
591–600 14
601–610 9
611–620 11
621–630 4
631–640 7
641–650 5
651–660 10
661–670 8
671–680 8
681–690 4
691–700 3
701–704 4
705+ 100
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Robert H. Pietrzak D-index placement in Psychology in 2026

The chart shows the D-index (discipline H-index) distribution of Psychology scientists ranked by Research.com in 2026. The highlighted bar marks where Robert H. Pietrzak sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 58 bars. Horizontal axis: D-Index, 30–31 to 144+. Vertical axis: number of scientists, 0 to 702. Most scientists, 702, have 32–33 D-Index. The last bar groups every scientist with 144 D-Index or more. The highlighted bar, 96–97 D-Index, is where this scientist sits. 30–31 D-Index: 398 scientists 32–33 D-Index: 702 scientists 34–35 D-Index: 671 scientists 36–37 D-Index: 659 scientists 38–39 D-Index: 641 scientists 40–41 D-Index: 671 scientists 42–43 D-Index: 617 scientists 44–45 D-Index: 558 scientists 46–47 D-Index: 495 scientists 48–49 D-Index: 487 scientists 50–51 D-Index: 445 scientists 52–53 D-Index: 390 scientists 54–55 D-Index: 408 scientists 56–57 D-Index: 345 scientists 58–59 D-Index: 325 scientists 60–61 D-Index: 321 scientists 62–63 D-Index: 248 scientists 64–65 D-Index: 290 scientists 66–67 D-Index: 218 scientists 68–69 D-Index: 219 scientists 70–71 D-Index: 215 scientists 72–73 D-Index: 183 scientists 74–75 D-Index: 169 scientists 76–77 D-Index: 132 scientists 78–79 D-Index: 137 scientists 80–81 D-Index: 120 scientists 82–83 D-Index: 112 scientists 84–85 D-Index: 86 scientists 86–87 D-Index: 101 scientists 88–89 D-Index: 83 scientists 90–91 D-Index: 77 scientists 92–93 D-Index: 70 scientists 94–95 D-Index: 78 scientists 96–97 D-Index: 58 scientists 98–99 D-Index: 53 scientists 100–101 D-Index: 57 scientists 102–103 D-Index: 48 scientists 104–105 D-Index: 53 scientists 106–107 D-Index: 46 scientists 108–109 D-Index: 24 scientists 110–111 D-Index: 35 scientists 112–113 D-Index: 27 scientists 114–115 D-Index: 32 scientists 116–117 D-Index: 31 scientists 118–119 D-Index: 22 scientists 120–121 D-Index: 16 scientists 122–123 D-Index: 24 scientists 124–125 D-Index: 18 scientists 126–127 D-Index: 11 scientists 128–129 D-Index: 19 scientists 130–131 D-Index: 10 scientists 132–133 D-Index: 16 scientists 134–135 D-Index: 10 scientists 136–137 D-Index: 12 scientists 138–139 D-Index: 8 scientists 140–141 D-Index: 5 scientists 142–143 D-Index: 12 scientists 144+ D-Index: 98 scientists
30–31 D-Index 144+

This scientist: 97 D-Index — 94th percentile

94% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 144 D-Index or more.

View D-Index distribution as a table
Number of Psychology scientists by D-index, Research.com 2026 ranking edition. Based on 11,416 ranked scientists.
D-Index Scientists This scientist
30–31 398
32–33 702
34–35 671
36–37 659
38–39 641
40–41 671
42–43 617
44–45 558
46–47 495
48–49 487
50–51 445
52–53 390
54–55 408
56–57 345
58–59 325
60–61 321
62–63 248
64–65 290
66–67 218
68–69 219
70–71 215
72–73 183
74–75 169
76–77 132
78–79 137
80–81 120
82–83 112
84–85 86
86–87 101
88–89 83
90–91 77
92–93 70
94–95 78
96–97 58 97
98–99 53
100–101 57
102–103 48
104–105 53
106–107 46
108–109 24
110–111 35
112–113 27
114–115 32
116–117 31
118–119 22
120–121 16
122–123 24
124–125 18
126–127 11
128–129 19
130–131 10
132–133 16
134–135 10
136–137 12
138–139 8
140–141 5
142–143 12
144+ 98
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Overview

Robert H. Pietrzak is affiliated with Yale University in the United States and conducts research primarily in the fields of Psychology and Medicine. The main subfields of their work include Clinical Psychology, General Health Professions, Epidemiology, Experimental and Cognitive Psychology, and Social Psychology.

The scientist's research covers several important topics with a focus on mental health and trauma. Key areas include Posttraumatic Stress Disorder Research, Resilience and Mental Health, Suicide and Self-Harm Studies, Healthcare professionals' stress and burnout, Migration, Health and Trauma, COVID-19 and Mental Health, and Traumatic Brain Injury Research.

Frequent publication venues for Robert H. Pietrzak include:

  • Journal of Psychiatric Research
  • Journal of Affective Disorders
  • Biological Psychiatry
  • UNC Libraries
  • The Journal of Clinical Psychiatry

Collaborations with other researchers are a notable part of their work. Frequent co-authors include:

  • Ian C. Fischer
  • Peter J. Na
  • Steven M. Southwick
  • Jack Tsai
  • Adriana Feder

Selected recent papers illustrate the focus on trauma, mental health, and healthcare worker well-being. These include:

  • A Randomized Controlled Trial of Repeated Ketamine Administration for Chronic Posttraumatic Stress Disorder, 2021, American Journal of Psychiatry
  • Moral distress in frontline healthcare workers in the initial epicenter of the COVID-19 pandemic in the United States: Relationship to PTSD symptoms, burnout, and psychosocial functioning, 2021, Depression and Anxiety
  • Psychological Impact of the COVID-19 Pandemic on Frontline Health Care Workers During the Pandemic Surge in New York City, 2021, Chronic Stress
  • PTSD is associated with neuroimmune suppression: evidence from PET imaging and postmortem transcriptomic studies, 2020, Nature Communications
  • Posttraumatic Stress Disorder in US Military Veterans, 2022, The Journal of Clinical Psychiatry

Best Publications

  • Prevalence and Axis I comorbidity of full and partial posttraumatic stress disorder in the United States: results from Wave 2 of the National Epidemiologic Survey on Alcohol and Related Conditions.

    Robert H. Pietrzak;Risë B. Goldstein;Steven M. Southwick;Bridget F. Grant

  • Validity of the CogState Brief Battery: Relationship to Standardized Tests and Sensitivity to Cognitive Impairment in Mild Traumatic Brain Injury, Schizophrenia, and AIDS Dementia Complex

    Paul M Maruff;Elizabeth Thomas;Lucette A Cysique;Lucette A Cysique;Bruce J Brew

  • Overweight and obesity are associated with psychiatric disorders: results from the National Epidemiologic Survey on Alcohol and Related Conditions.

    Nancy M. Petry;Danielle Barry;Robert H. Pietrzak;Julie A. Wagner

  • International meta-analysis of PTSD genome-wide association studies identifies sex- and ancestry-specific genetic risk loci

    Caroline M. Nievergelt;Caroline M. Nievergelt;Adam X. Maihofer;Adam X. Maihofer;Torsten Klengel;Torsten Klengel;Elizabeth G. Atkinson;Elizabeth G. Atkinson

  • Psychosocial buffers of traumatic stress, depressive symptoms, and psychosocial difficulties in veterans of Operations Enduring Freedom and Iraqi Freedom: The role of resilience, unit support, and postdeployment social support

    Robert H. Pietrzak;Douglas C. Johnson;Marc B. Goldstein;James C. Malley

  • How does social support enhance resilience in the trauma-exposed individual?

    Lauren Sippel;Robert Pietrzak;Dennis Charney;Linda Mayes

  • Lower synaptic density is associated with depression severity and network alterations.

    Sophie E. Holmes;Dustin Scheinost;Sjoerd J. Finnema;Mika Naganawa

  • Dimensional structure of DSM-5 posttraumatic stress symptoms: Support for a hybrid Anhedonia and Externalizing Behaviors model

    Cherie Armour;Jack Tsai;Jack Tsai;Tory A. Durham;Ruby Charak

  • Risk and protective factors associated with suicidal ideation in veterans of Operations Enduring Freedom and Iraqi Freedom.

    Robert H. Pietrzak;Marc B. Goldstein;James C. Malley;Alison J. Rivers

  • Prevalence of psychiatric disorders in U.S. older adults: findings from a nationally representative survey.

    Kristin Reynolds;Robert H Pietrzak;Robert H Pietrzak;Renée El-Gabalawy;Corey S Mackenzie

  • Elevated brain cannabinoid CB1 receptor availability in post-traumatic stress disorder: a positron emission tomography study.

    Alexander Neumeister;Marc D. Normandin;Marc D. Normandin;Robert H. Pietrzak;Robert H. Pietrzak;Daniele Piomelli

  • The role of coping, resilience, and social support in mediating the relation between PTSD and social functioning in veterans returning from Iraq and Afghanistan.

    Jack Tsai;Ilan Harpaz-Rotem;Robert H. Pietrzak;Steven M. Southwick

  • A network analysis of DSM-5 posttraumatic stress disorder symptoms and correlates in U.S. military veterans

    Cherie Armour;Eiko I. Fried;Marie K. Deserno;Jack Tsai

  • Trajectories of PTSD risk and resilience in World Trade Center responders: an 8-year prospective cohort study.

    R. H. Pietrzak;A. Feder;R. Singh;C. B. Schechter

  • Posttraumatic stress disorder in the US veteran population: results from the National Health and Resilience in Veterans Study

    Blair E. Wisco;Brian P. Marx;Erika J. Wolf;Mark W. Miller

  • Persistence of multiple illnesses in World Trade Center rescue and recovery workers: a cohort study.

    Juan P Wisnivesky;Susan L Teitelbaum;Andrew C Todd;Paolo Boffetta

  • Post-traumatic growth among veterans in the USA: results from the National Health and Resilience in Veterans Study.

    J. Tsai;R. El-Gabalawy;W. H. Sledge;S. M. Southwick

  • Gender Differences in Associations Between Body Mass Index and DSM-IV Mood and Anxiety Disorders: Results from the National Epidemiologic Survey on Alcohol and Related Conditions

    Danielle Barry;Robert H. Pietrzak;Nancy M. Petry

  • Cognitive effects of immediate-release methylphenidate in children with attention-deficit/hyperactivity disorder.

    Robert H Pietrzak;Catherine M Mollica;Paul Maruff;Peter J Snyder;Peter J Snyder

  • Health problems and medical utilization associated with gambling disorders: results from the National Epidemiologic Survey on Alcohol and Related Conditions.

    Benjamin J. Morasco;Robert H. Pietrzak;Carlos Blanco;Bridget F. Grant

Frequent Co-Authors

Steven M. Southwick
Steven M. Southwick Yale University
Jack Tsai
Jack Tsai The University of Texas Health Science Center at Houston
Ilan Harpaz-Rotem
Ilan Harpaz-Rotem Yale University
John H. Krystal
John H. Krystal Yale University
Paul Maruff
Paul Maruff University of Melbourne
Peter J. Snyder
Peter J. Snyder University of Rhode Island
Yen Ying Lim
Yen Ying Lim Monash University
Victor L. Villemagne
Victor L. Villemagne University of Pittsburgh
Ralph N. Martins
Ralph N. Martins Edith Cowan University
Christopher C. Rowe
Christopher C. Rowe University of Melbourne

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